JP2022186996A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress increase in size in a vertical direction of a vehicular seat when a seat cushion moves from a first height position to a lower second height position.

SOLUTION: A vehicular seat S includes: a seat back 1; a seat cushion 2 including a pair of cushion side frames 21 extending in a seat longitudinal direction; a slide rail 4 for moving the seat back 1 and the seat cushion 2 slidably along the seat longitudinal direction; a connection member 30 for connecting the seat cushion 2 to the slide rail 4; and a first rotating part 31 for connecting the connection member 30 to the slide rail 4 so as to be rotatable. The seat cushion 2 is movable from a first height position to a second height position that is lower than the first height position in the seat longitudinal direction. When the seat cushion 2 moves to the second height position, the first rotating part 31 is disposed in the same height position as the slide rail 4 in side view of the vehicular seat S.

SELECTED DRAWING: Figure 12

COPYRIGHT: (C)2023,JPO&INPIT

Description

The present invention relates to a vehicle seat, and in particular, it is possible to move a seat cushion from a first height position to a second height position below the first height position in the vertical direction of the vehicle seat. related to a vehicle seat.

A vehicle seat is already known in which a seat cushion can be moved from a first height position to a second height position below the first height position in the vertical direction of the vehicle seat. For example, in the vehicle seat of Patent Document 1, when the state is shifted to the stowed state, the seat cushion is moved from the first height position to the lower second height position, and the seat back is laid down. is described.

JP 2008-030659 A

In the vehicle seat of Patent Document 1, the side frames of the cushion frame are positioned above the upper end of the upper rail that constitutes the slide rail mechanism at the second height position. In the vehicle seat disclosed in Patent Document 1, in the stored state in which the seat cushion moves from the first height position to the second lower height position, the cushion side frames are positioned above the upper end of the upper rail, which is the rail member. As a result, the size of the vehicle seat in the vertical direction is increased.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and its object is to reduce the vertical movement of the vehicle seat when the seat cushion moves from the first height position to the lower second height position. To provide a vehicle seat capable of suppressing an increase in size.

According to the vehicle seat of the present invention, the vehicle seat includes a seat back, a seat cushion including a pair of cushion side frames extending in the longitudinal direction of the vehicle seat, a lower rail, an upper rail supported so as to be relatively movable with respect to the lower rail, the slide rail allowing the seat back and the seat cushion to slide along the longitudinal direction of the vehicle seat; the seat cushion and the slide; A connecting member that connects rails, and a first rotating portion that rotatably connects the connecting member to the slide rail. It is movable from a height position to a second height position that is lower than the first height position, and when the seat cushion moves to the second height position, in a side view of the vehicle seat, the The problem is solved by arranging the first rotating part at the same height position as the slide rail.

In the vehicle seat of the present invention constructed as described above, in a state in which the seat cushion is moved from the first height position to the second lower height position, the connecting member that connects the seat cushion and the slide rail is slid. Since the first rotating portion that is rotatably coupled to the rail is arranged at the same height position as the slide rail, it is possible to suppress an increase in size in the vertical direction of the seat.

In the vehicle seat described above, the lower end of the first rotating portion may be arranged below the upper end of the upper rail in the vertical direction of the vehicle seat.
In the above configuration, the place where the connecting member and the upper rail are connected is not limited, so the degree of freedom in design is improved.

In the vehicle seat described above, the pair of cushion side frames are connected by a connecting member, and include a slide lock device that locks the sliding movement of the slide rail, a cable member that unlocks the slide lock device, wherein, when the seat cushion is at the first height position, the connection member is arranged behind the cable member in the longitudinal direction of the vehicle seat, and the seat cushion is at the second height position. When moved to the position, the connection member may be arranged forward of the cable member in the longitudinal direction of the vehicle seat.
With the above configuration, it is possible to suppress interference between the connection member and the cable member.

In the above-described vehicle seat, the cushion side frame includes a flat portion arranged outside the slide rail in the width direction of the vehicle seat, and a flat portion arranged outside the slide rail when the seat cushion moves to the second height position. an inclined portion arranged at the same height position as the slide rail in the vertical direction of the vehicle seat and inclined upward toward the rear in the longitudinal direction of the vehicle seat, wherein the flat portion and the A curved portion that curves inward in the width direction of the vehicle seat is formed between the inclined portions. and below the inclined portion and the curved portion in the vertical direction of the vehicle seat.
With the above configuration, it is possible to suppress interference between the first rotating portion and the slide rail when the seat cushion moves from the first height position to the second height position.

In the above-described vehicle seat, the connection member is arranged between the inclined portion and the curved portion, and in the up-down direction of the vehicle seat, the connection member includes an upper end of the first rotating portion and the slide. It may be arranged above the upper end of the rail.
In the above configuration, the rigidity of the cushion side frame, particularly in the vicinity of the curved portion, is improved, and the connection member is prevented from interfering with the first rotating portion and the slide rail.

The vehicle seat described above further includes a second rotating portion that rotatably couples the connecting member to the seat cushion, wherein when the seat cushion moves to the second height position, the vehicle seat In a side view of the seat, the second rotating portion may be arranged at the same height position as the slide rail.
With the above configuration, it is possible to suppress an increase in size in the vertical direction of the seat.

In the above-described vehicle seat, when the seat cushion moves to the second height position, the first rotating portion and the second rotating portion move from the cushion side frame in a side view of the vehicle seat. They should be arranged at the same height position.
With the above configuration, it is possible to suppress an increase in size in the vertical direction of the seat.

In the vehicle seat described above, when the seat cushion moves to the second height position, the slide rail is arranged between the first rotating portion and the cushion side frame in the width direction of the vehicle seat. and preferably arranged between the second rotating portion and the cushion side frame.
In the above configuration, the cushion side frame is prevented from interfering with the connecting member.

In the vehicle seat described above, when the seat cushion moves to the second height position, the lower end of the second rotating portion is positioned below the lower end of the upper rail in the vertical direction of the vehicle seat. It is preferably arranged below the lower end of the first rotating portion.
With the above configuration, it is possible to suppress an increase in size in the vertical direction of the seat.

In the vehicle seat described above, the seat cushion includes a seat cushion frame, and a stepped portion is formed at a front end of the seat cushion frame. When the seat cushion moves to the second height position, A lower end of the first rotating portion and a lower end of the second rotating portion may be arranged below a lower end of the stepped portion in the vertical direction of the vehicle seat.
In the above configuration, when the seat cushion moves from the first height position to the second height position, the first rotating portion and the second rotating portion are prevented from interfering with the pan frame of the seat cushion frame. be done.

According to the vehicle seat of the present invention, when the seat cushion is moved from the first height position to the second lower height position, the connecting member connecting the seat cushion and the slide rail is rotated with respect to the slide rail. Since the movably coupled first rotating portion is arranged at the same height position as the slide rail, it is possible to suppress an increase in size in the vertical direction of the seat.
In addition, according to the vehicle seat of the present invention, the place where the connecting member and the upper rail are connected is not limited, so the degree of freedom in design is improved.
Further, according to the vehicle seat of the present invention, it is possible to suppress interference between the connection member and the cable member.
Further, according to the vehicle seat of the present invention, when the seat cushion moves from the first height position to the second height position, it is possible to suppress interference between the first rotating portion and the slide rail. Become.
Further, according to the vehicle seat of the present invention, the rigidity of the cushion side frame, particularly in the vicinity of the curved portion, is improved, and the connection member is prevented from interfering with the first rotating portion and the slide rail.
Further, according to the vehicle seat of the present invention, it is possible to suppress an increase in size in the vertical direction of the seat.
Further, according to the vehicle seat of the present invention, it is possible to suppress an increase in size in the vertical direction of the seat.
Further, according to the vehicle seat of the present invention, the cushion side frame is prevented from interfering with the connecting member.
Further, according to the vehicle seat of the present invention, it is possible to suppress an increase in size in the vertical direction of the seat.
Further, according to the vehicle seat of the present invention, when the seat cushion moves from the first height position to the second height position, the first rotating portion and the second rotating portion move the pan of the seat cushion frame. Interference with the frame is suppressed.

1 is a perspective view of a vehicle seat according to an embodiment of the invention; FIG. 1 is a perspective view of a seat frame included in a vehicle seat; FIG. FIG. 4 is a diagram showing a seat cushion frame and slide rails with a pan frame indicated by phantom lines; FIG. 4 is a front view of the seat frame, which is an enlarged view for explaining the shape of the cushion side frame; It is a top view of a seat frame. FIG. 4 is a front view of the seat frame with the display of the pan frame omitted; FIG. 4 is a side view of the seat frame when the seat state is the sitting state; FIG. 4 is a side view of the seat cushion frame when the seat state is the sitting state; FIG. 4 is a side view of the seat frame when the seat is in the stowed state; FIG. 4 is a perspective view of the seat frame when the seat is in the stowed state; FIG. 4 is a top view of the seat frame when the seat state is the stowed state; FIG. 11 is a cross-sectional view taken along line AA of FIG. 10 and is an explanatory view showing the structure around the slide rail when the seat is in the stowed state; FIG. 11 is a cross-sectional view taken along the line BB of FIG. 10; FIG. 11 is a perspective view of a vehicle seat according to a modified example; FIG. 10 is an explanatory view showing the structure around the rail connection bracket when the seat state is the seated state; FIG. 10 is an explanatory view showing the structure around the rail connection bracket when the seat state is the seated state; FIG. 4 is a front view showing the structure around the slide rail when the seat state is the seated state; It is a schematic diagram which shows the engagement state of a cover member and a rail connection bracket. FIG. 5 is a schematic diagram showing the position of the rubber damper when the seat state moves from the sitting state to the stowed state; It is a schematic diagram which shows the example of a change of the position of a rail connection bracket. FIG. 11 is an explanatory view showing the structure around the rail connection bracket when the vehicle seat according to another modified example is in the seated state; FIG. 4 is a front view showing the structure around the slide rail when the seat state is the seated state; FIG. 5 is a schematic diagram showing the position of the rubber damper when the seat state moves from the sitting state to the stowed state;

A configuration of a vehicle seat according to an embodiment of the present invention will be described below with reference to the drawings. However, the embodiments described below are intended to facilitate understanding of the present invention, and are not intended to limit the present invention. That is, the present invention can be modified and improved without departing from its spirit, and the present invention includes equivalents thereof.
In addition, in the following description, the material, shape, and size of the seat component are merely specific examples, and do not limit the present invention.

In the following, as an example of a vehicle seat, a vehicle seat mounted in a vehicle will be cited, and an example of the configuration thereof will be described. However, the present invention is not limited to vehicle seats mounted on ground vehicles having wheels, such as automobiles and railways, but is also applicable to seats mounted on aircraft, ships, etc. that move other than on the ground. can be applied.

Further, in the following description, the term "front-rear direction" refers to the front-rear direction of the vehicle seat (in other words, the front-rear direction of the seat body), which coincides with the traveling direction of the vehicle when the vehicle is running. The "seat width direction" is the width direction of the vehicle seat (in other words, the width direction of the seat body), and is the direction that coincides with the left-right direction viewed from the occupant seated on the vehicle seat. Further, the "vertical direction" is the vertical direction of the vehicle seat, and is the direction that coincides with the vertical direction when the vehicle is running on a horizontal plane.

In addition, the "outer side of the vehicle" in the seat width direction means the side closer to the outside of the vehicle body (to make it easier to understand, the side closer to the nearest door), and the "inner side" means the side closer to the inside of the vehicle body (easy to understand). Easy means the side away from the nearest door).
Also, in the following description, "rotation" means rotation about an axis extending in the width direction of the seat, unless otherwise specified.

Unless otherwise specified, the shape, position, posture, etc. of each part of the vehicle seat described below will be described assuming that the vehicle seat is in a seated state, which will be described later.

<Vehicle seat S>
A basic configuration of a vehicle seat (hereinafter referred to as a vehicle seat S) according to this embodiment will be described with reference to FIG. FIG. 1 is a perspective view of a vehicle seat S. FIG. In FIG. 1, a part of the vehicle seat S is shown with the trim cover T removed for convenience of illustration.

The vehicle seat S is a seat that is placed on the floor of the vehicle body and on which an occupant of the vehicle sits. In this embodiment, the vehicle seat S is used as a rear seat corresponding to a rear seat of a vehicle. However, the vehicle seat S is not limited to this, and can be used as a second-row middle seat or a third-row rear seat in a vehicle having three rows of seats in the front-rear direction.

The vehicle seat S, as shown in FIG. 1, has a seat body Sh as its body portion. The seat body Sh, as shown in FIG. , a headrest 3 for supporting the head of a seated person. The seat back 1 is attached to the vehicle body floor in a rotatable state via a rear bracket 14 which will be described later.

A seat frame F as shown in FIG. 2 is provided in the vehicle seat S. As shown in FIG. The seat frame F is composed of a seat back frame 10 that is the frame of the seat back 1 and a seat cushion frame 20 that is the frame of the seat cushion 2 . The seatback frame 10 and the seat cushion frame 20 are connected via a reclining mechanism (not shown). A seat back 1 and a seat cushion 2 are configured by providing a pad member P and a trim cover T on the outside of the seat back frame 10 and the seat cushion frame 20 . The pad member P is a urethane base material formed by foam molding using, for example, a urethane foam material, and the trim cover T is made of a material such as cloth or leather.

The seat cushion 2 is connected to the side of the seat back 1 at its rear end. Between the rear end portion of the seat cushion 2 and the lower end portion of the seat back 1, a cushion side frame 21, which will be described later, is interposed as shown in FIG. The cushion side frame 21 is attached to the seat back 1 in a rotatable state. This allows the seat cushion 2 to rotate together with the seat back 1 .

A slide rail 4, which will be described later, is installed at the lower portion of the seat body Sh. The seat body Sh is attached to the vehicle body floor by the slide rails 4 so as to be slidable in the front-rear direction.

Further, the seat body Sh can be stored in a folded state on a storage floor formed in front thereof. The storage floor is a concave shape formed by recessing a portion of the vehicle body floor (specifically, the portion of the vehicle floor located in front of the seat body Sh when the seat body Sh is seated) downward. Space.

<Seat frame F>
A basic configuration of a seat frame F (hereinafter referred to as a seat frame F) according to this embodiment will be described with reference to FIGS. 2 to 6. FIG. FIG. 2 is a perspective view of a seat frame F included in the vehicle seat S. FIG. FIG. 3 is a diagram showing the seat cushion frame 20 and the slide rails 4 with the pan frame 22 indicated by phantom lines. 4 is a front view of the seat frame F, which is an enlarged view for explaining the shape of the cushion side frame 21. FIG. 5 is a top view of the seat frame F. FIG. FIG. 6 is a front view of the seat frame F with the display of the pan frame 22 omitted.

As shown in FIG. 2, the seat frame F has, as main components, a seat back frame 10 that forms the skeleton of the backrest portion of the seat frame F, and a seat cushion frame 20 that forms the skeleton of the seating portion of the seat frame F. .

(Seat back frame 10)
First, the configuration of the seatback frame 10 will be described. As shown in FIG. 2 , the seatback frame 10 mainly includes a pipe frame 11 made of a pipe processed into a square frame shape, a back panel 12 and a back side frame 13 .

The back panel 12 is a plate-shaped frame provided on the back of the pipe frame 11 . The back panel 12 extends outside the pipe frame 11 when viewed from the front. That is, the outer edge of the back panel 12 is positioned outside the pipe frame 11 .

The back side frames 13 are frames that are attached to the left and right side portions of the pipe frame 11 and extend in the vertical direction. In other words, the back side frame 13 is a frame that is arranged outside the seat of the pipe frame 11 and constitutes the left and right end portions of the seat back frame 10 together with the side portions of the pipe frame 11 . The back side frame 13 is a plate-like frame with a U-shaped cross section that opens toward the inside of the seat. The back side frame 13 has an upper portion welded to the central portion of the side portion of the pipe frame 11 and a lower portion rotatably attached to the rear bracket 14 . The rear bracket 14 has an upper portion connected to the back side frame 13 . Also, the lower portion of the rear bracket 14 is connected to the upper rail 6 of the slide rail.

The slide rail 4 is a device for sliding the seat body Sh along the longitudinal direction, and has a known structure (structure of a general slide rail mechanism). The slide rails 4 each include a pair of lower rails 5 fixed on the vehicle body floor and upper rails 6 slidably movable with respect to the lower rails 5 . An upper rail 6 is slidable with respect to a lower rail 5 fixed to the vehicle body. The seat back frame 10 and the seat cushion frame 20 are attached to the upper rail 6 so that they can move back and forth with respect to the lower rail 5 together with the upper rail 6 . Therefore, the seat body Sh attached to the upper rail 6 moves back and forth as the upper rail 6 slides.

The upper rail 6 is normally locked by the slide lock device 60 in a non-slidable state, and when the passenger performs a predetermined operation, the upper rail 6 is unlocked and becomes slidable. More specifically, an operating member (not shown) is connected to the slide lock device 60 via a cable member 61 . As for the slide lock device 60, a general device for locking the upper rail 6 can be used, so a detailed description thereof will be omitted. When the operation member is operated, the cable member 61 is pulled, and as a result, the slide lock mechanism operates to unlock the upper rail 6 .

Next, the wire 16 attached to the pipe frame 11 and the back side frame 13 will be described. Note that the wire 16 is a linear member made of metal. As shown in FIG. 2, the seat frame F is provided with a wire 16 connecting the lower portion of the pipe frame 11 and the back side frame 13 on each side. The wire 16 has a horizontal extending portion extending in the lateral direction of the seat between the connecting portions of the lower portion of the pipe frame 11 and the back side frame 13 . This horizontal extension functions as a lower anchorage for fixing the child seat.

(Seat cushion frame 20)
Next, the configuration of the seat cushion frame 20 will be described. As shown in FIG. 2, the seat cushion frame 20 mainly includes a cushion side frame 21, a pan frame 22, and a connection pipe 24 arranged on the left and right.

The cushion side frame 21 is a frame extending in the seat front-rear direction. A pan frame 22 is connected to the front ends of the left and right cushion side frames 21 . The pan frame 22 is a substantially rectangular plate-like frame that supports the thighs of the occupant. A stepped portion 23 is formed at the front end portion of the pan frame 22 .

A connection pipe 24 is provided between the left and right cushion side frames 21 . Rear end portions of the left and right cushion side frames 21 are rotatably connected to the back side frames 13 of the seat back frame 10 .

As shown in FIG. 2, the pressure receiving member 25, which is an S spring, is arranged to extend in the seat front-rear direction. Specifically, the front end of the pressure receiving member 25 is attached to the pan frame 22 , and the rear end of the pressure receiving member 25 is attached to the connection pipe 24 .

As shown in FIGS. 2 to 5, the cushion side frame 21 includes a flat portion 21a arranged outside the slide rail 4 in the seat width direction and an inclined portion 21a which is inclined upward toward the rear in the seat front-rear direction. A curved portion 21c that curves inward in the seat width direction is formed between the flat portion 21a and the inclined portion 21b.

As shown in FIGS. 2, 3 and 6, the seat cushion 2 and the slide rail 4 are connected by a connecting link 30 as a connecting member. More specifically, the pan frame 22 of the seat cushion frame 20 is connected to the connection link 30 via the cushion connection bracket 33, and the upper rail 6 of the slide rail 4 is connected to the connection link via the rail connection bracket 40. By doing so, the seat cushion 2 and the slide rail 4 are connected by the connecting link 30 . A pair of connecting links 30 are provided spaced apart in the seat width direction, and the pair of connecting links 30 are connected by a connecting link connecting member 34 in the seat width direction. The connection link connection member 34 interlocks the operation of the pair of connection links 30 .

Since the configuration around the connecting link 30 is symmetrical and substantially the same, the configuration around the connecting link 30 on the left side of the seat will be described below with reference to the drawings. One end of the connecting link 30 is attached to the upper rail 6 of the slide rail 4 by a first rotating member 31 as a first rotating portion via a rail connecting bracket 40, and the other end of the connecting link 30 is , and is attached to the pan frame 22 by a second rotating member 32 as a second rotating portion via a cushion connecting bracket 33 .

The rail connection bracket 40 is provided with a rail fixing portion 41 fixed to the upper surface of the upper rail 6 of the slide rail 4, and bent downward by approximately 90 degrees from the rail fixing portion 41, and extends inside the lower rail 5 in the seat width direction. It has a rotation shaft mounting portion 42 arranged in the . As shown in FIGS. 3 and 6 , the connecting link 30 is attached to the rotating shaft attachment portion 42 by the first rotating member 31 .

As shown in FIG. 6, at the lower end of the seatback frame 10, the lower end 16a of the wire 16 connecting the pipe frame 11 and the backside frame 13 is arranged above the lower end 24a of the connecting pipe 24 in the seat vertical direction. ing. According to such a configuration, interference between the wire 16 and the connection pipe 24 is suppressed.

<Changes in seat conditions>
Changes in the seat state will be described below with reference to FIGS. 7 to 9. FIG. 7 to 9 are side views of the seat frame F, and FIGS. 7 and 8 are views when the seat is in the sitting state. FIG. 9 is a side view of the seat frame F when the seat is in the stowed state.

In this embodiment, the seat state can be switched between a seatable state shown in FIGS. 7 and 8 and a retracted state shown in FIG. The seated state is a state in which the seat back 1 stands up with respect to the floor of the vehicle body and an occupant can be seated on the seat cushion 2 . When the seat is ready for sitting, as shown in FIG. 1, the seat back 1 is slightly slanted rearward, and the seat cushion 2 serves as a seating surface (a surface on which the buttocks and thighs of the occupant rest). is facing upward.

The stored state is a state in which the seat body Sh is stored in a folded state. When the seat body Sh shifts to the stowed state, the seat back 1 (seat back frame 10) falls forward with respect to the vehicle body floor, and the seat cushion 2 (seat cushion frame 20) moves downward. Then, in a side view, the seat back frame 10 and the seat cushion frame 20 are folded substantially parallel to each other.

Hereinafter, the height position of the seat cushion 2 when the seat is in the sitting state is defined as the first height position, and the height position of the seat cushion 2 when the seat is in the retracted state is defined as the second height position. position. That is, when the seat state shifts from the sitting state to the stowed state, the height position of the seat cushion 2 moves from the first height position to the second height position below the first height position. .

Next, the movement of the seat frame F when switching the seat state will be described. When the seat state is the seated state, the seat back 1 is in an upright position with respect to the floor of the vehicle body, and the seat cushion 2 is in a substantially horizontal position with respect to the floor of the vehicle body.

When the seat state is switched from the seated state to the stowed state, the seat back frame 10 (seat back 1) rotates with respect to the vehicle body floor so as to lay down forward. In addition, the seat cushion frame 20 (seat cushion 2) moves forward and downward as the seatback frame 10 (seatback 1) tilts forward. Thereafter, the seat state is retracted when the seat back frame 10 (seat back 1) folds over the seat cushion frame 20 (seat cushion 2) due to further forward tilting motion of the seat back frame 10 (seat back 1). reach a state.

<Structure of Seat Frame F in Stored State>
The configuration of the seat frame F when the seat is in the stowed state (in other words, when the seat cushion 2 is at the second height position) will be described below with reference to FIGS. 10 to 13. FIG. FIG. 10 is a perspective view of the seat frame when the seat state is the stowed state, and FIG. 11 is a top view of the seat frame when the seat state is the stowed state. 12 is a cross-sectional view taken along the line AA of FIG. 10, which is an explanatory view showing the structure around the slide rail when the seat is in the retracted state, and FIG. 13 is a cross-sectional view taken along the line BB of FIG. be.

As shown in FIG. 12 , the rail fixing portion 41 of the rail connection bracket 40 is fixed to the surface of the upper end 6 a of the upper rail 6 of the slide rail 4 . The rotation shaft attachment portion 42 of the rail connection bracket 40 is bent downward by approximately 90 degrees from the rail fixing portion 41, and is positioned inside the lower rail 5 in the seat width direction, more specifically, between the lower rail and the connection link 30. is placed between By arranging the rotation shaft attachment portion 42 of the rail connection bracket 40 in this manner, the first rotation is performed both when the seat cushion 2 is at the first height position and at the second height position. The height position of the moving member 31 is arranged at the same height position as the slide rail 4 .

As shown in FIGS. 12 and 13, when the seat cushion 2 is moved to the second height position (storage state), the first rotating member 31 is positioned closer to the slide rail 4 in the front view and side view of the vehicle seat S. As shown in FIGS. placed at the same height as According to such a configuration, it is possible to suppress an increase in the size of the vehicle seat S in the vertical direction (that is, to reduce the size of the vehicle seat S).

Further, as shown in FIG. 13, when the seat cushion 2 is moved to the second height position (storage state), in a side view of the vehicle seat S, the first rotating member 31 is moved to the slide rail 4 in the seat front-rear direction. are placed overlapping each other. According to such a configuration, it is possible to suppress an increase in the size of the vehicle seat S in the front-rear direction.

As shown in FIGS. 12 and 13, when the seat cushion 2 is moved to the second height position (storage state), the first turning member 31 and the second turning member 31 are shown in front and side views of the vehicle seat S. Both of the moving members 32 are arranged at the same height position as the cushion side frames 21 . According to such a configuration, it is possible to suppress an increase in the size of the vehicle seat S in the vertical direction.

Further, as shown in FIGS. 12 and 13, when the seat cushion moves to the second height position, the second turning member 32 is at the same height as the slide rails 4 in front view and side view of the vehicle seat S. It is placed in the vertical position. According to such a configuration, it is possible to suppress an increase in the size of the vehicle seat S in the vertical direction.

As shown in FIG. 12, the first rotating member 31 has an upper end 31a and a lower end 31b. It is With such a configuration, there is no restriction on where the connecting link 30 and the upper rail 6 are connected, so the degree of freedom in design is improved.

As shown in FIG. 12, the second rotating member 32 has an upper end 32a and a lower end 32b. A lower end 32 b of the moving member 32 is arranged below the lower end 6 b of the upper rail 6 and below the lower end 31 b of the first rotating member 31 . According to such a configuration, it is possible to suppress an increase in the size of the vehicle seat S in the vertical direction.

As shown in FIG. 5, when the seat cushion 2 is at the first height position (seated state), the connection pipe 24 is arranged behind the cable member 61 of the slide lock device 60 in the seat front-rear direction. . Further, as shown in FIGS. 10 and 11, when the seat cushion 2 is moved to the second height position (storage state), the connection pipe 24 is arranged forward of the cable member 61 in the seat front-rear direction. there is With such a configuration, interference between the connection pipe 24 and the cable member 61 can be suppressed.

As shown in FIG. 10, the connection pipe 24 is disposed between the inclined portion 21b and the curved portion 21c, and is positioned between the upper end 31a of the first rotating member 31 and the upper end of the slide rail 4 (in other words, the upper end of the slide rail 4) in the vertical direction of the seat. It is arranged above the upper end 6 a ) of the rail 6 . According to such a configuration, the rigidity of the cushion side frame 21 , particularly the vicinity of the curved portion 21 c is improved, and the connecting pipe 24 is prevented from interfering with the first rotating member 31 and the slide rail 4 .

As shown in FIG. 12, when the seat cushion 2 is moved to the second height position (storage state), the first rotating member 31 moves between the inclined portion 21b and the curved portion 21c of the cushion side frame 21 in the seat width direction. It is arranged inside and below the inclined portion 21b and the curved portion 21c in the seat up-down direction. According to such a configuration, when the seat cushion 2 moves from the first height position (sitting state) to the second height position (storage state), interference between the first rotating member 31 and the slide rails 4 is minimized. can be suppressed.

As shown in FIG. 12, when the seat cushion 2 is moved to the second height position (storage state), the slide rail 4 is arranged between the first rotating member 31 and the cushion side frame 21 in the seat width direction. Moreover, the slide rail 4 is arranged between the second rotating member 32 and the cushion side frame 21 . Such a configuration prevents the cushion side frames 21 from interfering with the connecting link 30 .

As shown in FIG. 13, when the seat cushion 2 moves to the second height position (storage state), the lower end 31b of the first rotating member 31 and the lower end 32b of the second rotating member 32 in the vertical direction of the seat are , the lower end 23a of the stepped portion 23 provided in the pan frame 22 forming the front end of the seat cushion frame 20. As shown in FIG. According to such a configuration, when the seat cushion 2 moves from the first height position (sitting state) to the second height position (storage state), the first turning member 31 and the second turning member 32 is suppressed from interfering with the seat cushion frame 20 (more specifically, the pan frame 22).

<Modification>
Although one example of the configuration of the vehicle seat of the present invention has been described above, the above-described embodiment is merely an example, and other embodiments are also conceivable.

In the above embodiment, the vehicle seat S that can switch the seat state to the stowed state is shown as an example. As long as the vehicle seat can be moved downward to the second height position, the seat state may not be switched to the stowed state. Also, the vehicle seat according to the present embodiment can be configured as a double fold-down seat.

Hereinafter, the vehicle seat SX according to the modified example will be described with reference to FIGS. 14 to 19 in terms of differences from the vehicle seat S. The vehicle seat SX includes a rubber damper 150 that prevents the seat cushion 2X from sinking downward excessively when the seat cushion 2X moves to the second height position (storage state). In the following description, the structure around the left slide rail 4 will be described as an example, but the rubber dampers 150 may be provided corresponding to the left and right slide rails 4 of the vehicle seat SX.

As shown in FIG. 14, the vehicle seat SX includes a cover member K that covers the side surface of the seat cushion 2X. According to the cover member K, members such as the link mechanism of the seat cushion 2X are not exposed to the outside. The cover member K is provided with a clip K2 on its rear surface K1. The cover member K is fixed to the side surface of the seat cushion 2X by engaging the clip K2 with a cover mounting hole 144a of the cover mounting portion 144 of the rail connection bracket 140, which will be described later.

As shown in FIGS. 15 to 18, the rail connection bracket 140 includes a rail fixing portion 141 fixed to the upper surface of the upper rail 6 of the slide rail 4 and bent downward from the rail fixing portion 141 by approximately 90 degrees. The rotary shaft attachment portion 142 is provided and arranged inside the lower rail 5 in the seat width direction.

The rail connection bracket 140 includes a rubber damper abutting portion 143 with which a rubber damper 150, which will be described later, abuts. As shown in FIG. 18 , the rubber damper contact portion 143 extends in the seat front-rear direction, and a recess 143 a recessed outward in the seat width direction is formed at a boundary position between the rubber damper contact portion 143 and the rotation shaft mounting portion 142 . .

The rail connection bracket 140 has a cover attachment portion 144 for attaching the cover member K, as shown in FIGS. The cover attachment portion 144 is vertically erected with respect to the rail fixing portion 141 and the rubber damper contact portion 143 . A cover attachment hole 144a that opens in the seat width direction is formed in the cover attachment portion 144 . A clip K2 of the cover member K is engaged with the cover mounting hole 144a (FIG. 18). As shown in FIG. 18, the rear surface K1 of the cover member K is formed with ribs K3 extending in the vertical direction.

As shown in FIGS. 15 and 16 , the rubber damper 150 is attached to the rubber damper attachment portion 135 of the connecting link 130 . The rubber damper mounting portion 135 is bent so as to protrude outward in the seat width direction from the connecting link 130, and the rubber damper 150 is mounted on the front surface thereof. As shown in FIGS. 15 and 17 , the rubber damper 150 is formed with a rubber damper mounting hole 152 for mounting the rubber damper 150 to the rubber damper mounting portion 135 . A fastening member such as a screw is inserted through the rubber damper mounting hole 152 to mount the rubber damper 150 to the rubber damper mounting portion 135 .

As shown in FIGS. 15 and 16, when the seat cushion 2X is at the first height position (sitting state), the upper surface 150a of the rubber damper 150 is arranged below the lower end 134a of the connecting link connecting member 134. ing.

When the seat cushion 2X moves from the first height position (sitting state) to the second height position (storage state) (FIG. 19), the rubber damper 150 contacts the rubber damper contact portion 143 of the rail connection bracket 140. This prevents the seat cushion 2X from sinking downward too much.

A concave portion 143a is formed in the rubber damper contact portion 143 of the rail connection bracket 140 (FIG. 18). abut on three recesses 143a provided in the rubber damper abutting portion 143, respectively. Although the number of the protrusions 151 of the rubber damper 150 and the number of the recesses 143a of the rubber damper contact portion 143 is three, the number may be one, two, four or more, or may be less than three.

As shown in FIGS. 17 and 18 , the first rotating member 131 (in other words, the rotating shaft mounting portion 142) is configured to extend through a cover mounting hole 144a provided in the cover mounting portion 144 and in the seat up-down direction and the seat front-back direction. , are arranged at positions that do not overlap in the three directions of the seat width direction. More specifically, the first rotating member 131 and the rotating shaft mounting portion 142 are arranged below the cover mounting hole 144a in the seat vertical direction, and the first rotating member 131 and the rotating shaft mounting portion 142 are arranged in the seat front-rear direction. The shaft mounting portion 142 is arranged behind the cover mounting hole 144a, and the first turning member 131 and the turning shaft mounting portion 142 are arranged inside the cover mounting hole 144a in the seat width direction. Therefore, interference of the first rotating member 131 with the cover member K is suppressed.

As shown in FIG. 19, the length of the rail connection bracket 140 in the longitudinal direction (front-rear direction) is longer than the length of the rubber damper 150 in the longitudinal direction (vertical direction in the seated state). Further, when the seat cushion 2X is at the second height position (storage state), the front end (that is, the upper surface 150a) of the rubber damper 150 is arranged forward of the front end 140a of the rail connection bracket 140 (FIG. 19). .

Also, the position of the rubber damper contact portion 143 when the seat cushion 2X is in the second height position (storage state) can be changed from the position shown in FIGS. 14 to 19. FIG. FIG. 20 is a schematic diagram showing an example of changing the position of the rail connection bracket 140. As shown in FIG. The front end of the rubber damper 150 (that is, the upper surface 150a) and the front end 140a of the rail connection bracket 140 (in other words, the front end of the rubber damper abutting portion 143) can be arranged at positions that protrude forward from the front end 6c of the upper rail 6. It is possible. According to such a configuration, the rubber damper 150 is appropriately supported by the rubber damper contact portion 143 of the rail connection bracket 140 when the seat cushion 2X is at the second height position (storage state).

In the modified example described above, when the seat state is switched from the seated state to the stowed state, the seat cushion 2X moves forward and downward as the seatback 1 tilts forward. As another modified example, when the seat state is switched from the seated state to the stowed state, the seat cushion 2X can be configured to move backward and downward as the seatback 1 tilts forward. (FIGS. 21-23).

In another modification, as shown in FIGS. 21 and 22, the rubber damper 150 is arranged inside the rail connection bracket 140 in the seat width direction. In other words, the rubber damper 150 is arranged inside the connecting link 130 in the seat width direction. That is, when connecting link 130 rotates rearward, rubber damper 150 is prevented from interfering with other members.

Further, as shown in FIGS. 21 to 23, the rubber damper abutment portion 160 with which the rubber damper 150 abuts when the seat cushion 2X moves to the second height position (storage state) causes the slide rail 4 to slide. It is arranged on the inner side in the seat width direction than the lock plate R for locking the . According to such a configuration, interference between the lock plate R and the rubber damper contact portion 160 is suppressed.

S, SX vehicle seat (vehicle seat)
Sh, ShX Seat body T Trim cover P Pad member 1, 1X Seat back 2, 2X Seat cushion 3, 3X Headrest 4 Slide rail (slide rail)
5 lower rail 5a upper end 5b lower end 6 upper rail 6a upper end 6b lower end 6c front end F seat frame 10 seat back frame 11 pipe frame 12 back panel 13 back side frame 14 rear bracket 15 rear connecting pipe 16 wire 16a lower end 20 seat cushion frame 21 cushion side Frame 21a Flat portion 21b Inclined portion 21c Curved portion 22 Pan frame 23 Stepped portion 23a Lower end 24 Connection pipe (connection member)
24a lower end 25 pressure receiving member 30 connecting link (connecting member)
31 first rotating member (first rotating portion)
31a Upper end 31b Lower end 32 Second rotating member (second rotating portion)
32a Upper end 32b Lower end 33 Cushion connection bracket 34 Connection link connection member 40 Rail connection bracket 41 Rail fixing part 42 Rotating shaft mounting part 60 Slide lock device 61 Cable member K Cover member K1 Back surface K2 Clip K3 Rib 130 Connection link (connection member)
131 first rotating member (first rotating portion)
134 Connection link connection member 134a Lower end 135 Rubber damper mounting portion 140 Rail connection bracket 140a Front end 141 Rail fixing portion 142 Rotating shaft mounting portion 143 Rubber damper contact portion 143a Concave portion 144 Cover mounting portion 144a Cover mounting hole 150 Rubber damper 150a Upper surface 151 Protruding portion 152 Rubber damper mounting hole R Lock plate 160 Rubber damper contact portion

Claims (10)

A vehicle seat,
seat back and
a seat cushion comprising a pair of cushion side frames extending in the longitudinal direction of the vehicle seat;
a slide rail, comprising a lower rail and an upper rail supported so as to be relatively movable with respect to the lower rail, for sliding the seat back and the seat cushion along the longitudinal direction of the vehicle seat;
a connecting member that connects the seat cushion and the slide rail;
a first rotating portion that rotatably couples the connecting member to the slide rail;
The seat cushion is movable in the vertical direction of the vehicle seat from a first height position to a second height position below the first height position,
For a vehicle, wherein when the seat cushion is moved to the second height position, the first rotating portion is arranged at the same height position as the slide rail in a side view of the vehicle seat. sheet. 2. The vehicle seat according to claim 1, wherein a lower end of said first rotating portion is arranged below an upper end of said upper rail in the vertical direction of said vehicle seat. The pair of cushion side frames are connected by a connecting member,
a slide lock device that locks the slide movement of the slide rail;
a cable member for unlocking the slide lock device,
When the seat cushion is at the first height position, the connection member is arranged rearward of the cable member in the front-rear direction of the vehicle seat,
2. The connection member according to claim 1, wherein when the seat cushion is moved to the second height position, the connection member is arranged forward of the cable member in the longitudinal direction of the vehicle seat. vehicle seat. The cushion side frame has a flat portion arranged outside the slide rail in the width direction of the vehicle seat, and a flat portion that is arranged above and below the vehicle seat when the seat cushion is moved to the second height position. an inclined portion arranged at the same height position as the slide rail in the direction and inclined upward toward the rear in the front-rear direction of the vehicle seat,
A curved portion that curves inward in the width direction of the vehicle seat is formed between the flat portion and the inclined portion,
The first rotating portion is arranged inside the inclined portion and the curved portion in the width direction of the vehicle seat, and below the inclined portion and the curved portion in the vertical direction of the vehicle seat. 4. The vehicle seat according to claim 3, characterized in that it is . The connecting member is arranged between the inclined portion and the curved portion,
5. The vehicle seat according to claim 4, wherein the connection member is arranged above an upper end of the first rotating portion and an upper end of the slide rail in the vertical direction of the vehicle seat. . a second rotating portion that rotatably couples the connecting member to the seat cushion;
3. The second rotating portion is arranged at the same height position as the slide rail in a side view of the vehicle seat when the seat cushion moves to the second height position. 2. The vehicle seat according to 1. When the seat cushion moves to the second height position, the first rotating portion and the second rotating portion are arranged at the same height position as the cushion side frame in a side view of the vehicle seat. The vehicle seat according to claim 6, characterized in that: When the seat cushion moves to the second height position, the slide rail is arranged between the first rotating portion and the cushion side frame in the width direction of the vehicle seat, and 7. The vehicle seat according to claim 6, wherein the vehicle seat is arranged between the moving part and the cushion side frame. When the seat cushion moves to the second height position, the lower end of the second rotating portion is arranged below the lower end of the upper rail in the vertical direction of the vehicle seat, and the second rotating portion is positioned below the lower end of the upper rail. 7. The vehicle seat according to claim 6, which is arranged below the lower end of the first rotating portion. The seat cushion includes a seat cushion frame,
A stepped portion is formed at the front end of the seat cushion frame,
When the seat cushion moves to the second height position, the lower end of the first rotating portion and the lower end of the second rotating portion are positioned higher than the lower end of the stepped portion in the vertical direction of the vehicle seat. 7. A vehicle seat according to claim 6, arranged downward.

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